1、_SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2008 SAE International All rights reserved. No part of this publication ma
3、y be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA)
4、Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgJ1670 DEC2008 SURFACEVEHICLESTANDARDIssued 1993-05Revised 2008-12 Superseding J1670 AUG2005 Type “F“ Clamps for Plumbing Applications RATIONALEThis proposed change to SAE J1670 is being requested to clarify material ca
5、llouts in Section 6. The current standard allows for the use of either 201 series or 300 series austenitic stainless steel for bands and housings, but limits the alloy callout for the screw to 300 series stainless steel. Changing the material callout to “200 series or 300 series austenitic stainless
6、 steel” for bands, screws and housings allows for the use of materials that exhibit similar corrosion resistant properties for all three components while making use of raw materials that are readily available for clamp applications. 1. SCOPE This SAE Standard covers complete dimensional and general
7、specifications for worm drive hose clamps for general use in the plumbing industry. 1.1 Purpose To establish minimum functional guidelines for worm drive hose clamps intended for use in Plumbing application, herein referred to as Type “F“ clamps. 2. REFERENCES There are no referenced publications sp
8、ecified herein. 3. GENERAL DESCRIPTION Worm drive hose clamps with tangentially mounted buttress-like threaded screws, enclosed in a housing which is securely fastened to the band, which, in turn, is engaged with the screw. When the screw is rotated in a clockwise direction, the clamp becomes smalle
9、r and conversely a counterclockwise motion of the screw will eventually open the clamp.4. GENERAL DIMENSIONS The following specifications tables and illustrations apply to Type “F“ worm drive hose clamps. 4.1 Shipping Diameter Type “F“ worm drive clamps will be supplied in an “A“ Diameter, full open
10、, still engaged. See Table 1. SAE J1670 Revised DEC2008 Page 2 of 54.2 Identification Type “F” worm drive hose clamps will be permanently marked with Country of Origin and/or manufacturers identification. 4.2.1 The SAE clamp size number shall be clearly marked on the band. 5. SCREWS The screws shall
11、 conform to the specifications designated as follows: 5.1 The screw head shall have an 8 mm (5/16 in) hex collar head screw as specified in Figure 1, slot optional. 5.1.1 Screw threads shall be modified buttress external thread standard with manufacturer. 6. MATERIALS Bands, screws and housings shal
12、l be fabricated from 200 or 300 series austenitic stainless steel. 7. WORKMANSHIP All clamps and components thereof shall be free of burrs, seams, loose scale, and other defects that might affect the performance.8. TEST AND PERFORMANCE REQUIREMENTS Clamp acceptability shall be determined by complian
13、ce with the following methods. 8.1 Clamping Diameter Range Clamps shall assemble over and close tight upon round mandrels equal to the corresponding open and closed diameters listed in Table 1. Diameters smaller than the diameters shown are permissible. For diameters greater than listed, contact the
14、 manufacturers. 8.1.1 When tested for minimum and maximum open diameter, all threads must be fully engaged. 8.2 Free Running Torque 8.2.1 Free Torque The torque value shall be expressed in newton-meters (pound-inches) when the clamp is tightened four complete revolutions of the screw or nut, while i
15、n the free state. This value does not include any break-away effects due to staking or passage of the band ends beyond the screw head. 8.3 Durability Torque Clamps shall be tightened once, over a round steel mandrel of the specified open diameters less 1.52 mm (0.06 in) with hand-applied torque of 5
16、.6 Nm (50 lb-in) There shall be no failure occurring in the clamp nor evidence of deformation of the threads on the screw and/or in the band. There shall be no deformation of the housing. SAE J1670 Revised DEC2008 Page 3 of 5FIGURE 1 - STAINLESS STEEL HOSE CLAMPS SAE J1670 Revised DEC2008 Page 4 of
17、5TABLE 1 - DIMENSIONS OF TYPE F WORM DRIVE HOSE CLAMPS SAESize No. ADia.(1)OpenmmADia.(1)OpeninADia.(1)ClosedmmADia.(1)ClosedinRRadius(2)Over ScrewmmRRadius(2)Over Screw in06 19.8 0.78 11.2 0.44 29.7 1.17 08 23.1 0.91 12.7 0.50 30.9 1.22 10 26.9 1.06 14.2 0.56 32.0 1.26 12 31.7 1.25 17.5 0.69 33.5 1
18、.32 16 38.1 1.50 20.6 0.81 36.1 1.42 20 44.4 1.75 20.6 0.81 38.6 1.52 24 50.8 2.00 26.9 1.06 41.4 1.63 28 57.1 2.25 33.3 1.31 44.5 1.75 32 63.5 2.50 39.6 1.56 47.2 1.86 36 69.8 2.75 45.9 1.81 50.0 1.97 40 76.2 3.00 52.3 2.06 53.0 2.09 44 82.5 3.25 58.6 2.31 55.8 2.20 48 88.9 3.50 65.0 2.56 58.9 2.32
19、 52 95.2 3.75 71.4 2.81 61.9 2.44 56 101.6 4.00 77.7 3.06 65.0 2.56 60 107.9 4.25 84.1 3.31 68.0 2.68 64 114.3 4.50 90.4 3.56 71.1 2.80 72 127.0 5.00 103.1 4.06 77.2 3.04 80 139.7 5.50 117.3 4.62 83.3 3.28 88 152.4 6.00 130.0 5.12 89.6 3.53 96 165.1 6.50 141.2 5.56 95.7 3.77 104 177.8 7.00 156.9 6.1
20、8 101.8 4.01 1. Diameter shall be determined by assembly over mandrels. 2. Reference dimensions for clearance purposes only. NOTES: For sizes greater than 104 contact the manufacturer. Clamps closing smaller than list must comply with 8.1.8.4 Ductility Tests Bands shall be subjected to 180 degrees,
21、bend around a 4.77 mm (0.188 in) diameter mandrel, a t the perforated portion of the band and then restraightened. The band shall at no time during or after the test exhibit cracks, breaking, or other indications of failure. 9. INSTALLATION TORQUE The suggested installation torque for a particular a
22、pplication must be established by the user. 9.1 Manufacturers recommended installation torque for all TYPE “F“ worm drive clamps is: TYPE “F“ = 3.44 Nm (30 lb-in) for all size and materials. SAE J1670 Revised DEC2008 Page 5 of 59.2 Assembly Tools It is advised that the use of power tools to install
23、worm drive hose clamps be of the stall torque type. Use of clutch type orimpact type assembly tools is not recommended. 10. NOTES 10.1 Marginal Indicia A change bar (I) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, h
24、ave been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE HOSE/CLAMP PERFORMANCE AND COMPATIBILTY COMMITTEE
